One of the references on over rev data:
Porsche Rev range activity guide | 911virgin
From the site:
Until a few years ago ignitions recorded in ranges 3 and 4 were considered by the Manufacturer to be safe with such vehicles still eligible for Porsche Extended warranty. Ignitions recorded in Ranges 5 and 6 would not be considered for warranty with existing policies invalidated at the point of over rev. Current Porsche warranty procedure ( as of 2017) considers activity in ranges 3 and 4 to be potentially problematic with compression tests and / or oil checks deemed necessary irrespective of whether or not incursions occurred several hundred operating hours prior to the check. However, in a pragmatic relaxation of previous protocol vehicles with activity in ranges 5 and 6 will be considered for extended warranty provided the over rev activity occurred more than 200 operating hours ago. The warranty provision is at the discretion of the importer and subject to the aforementioned compression/oil checks.
*** Porsche dealers are advised by the manufacturer to disregard over rev data on all PDK transmission cars when assessing a car for warranty provision. Consequently a PDK vehicle with activity recorded as high as Range 6, assuming all other mechanical checks are passed, will be applicable for warranty*** - Accurate as of 2017.